package com.hyt.it.ogt.ykcj.common.utils;

import java.lang.management.ManagementFactory;
import java.math.BigDecimal;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.time.Instant;
import java.time.LocalDate;
import java.time.LocalDateTime;
import java.time.ZoneId;
import java.time.format.DateTimeFormatter;
import java.util.ArrayList;
import java.util.Calendar;
import java.util.Date;
import java.util.List;

import org.apache.commons.lang3.time.DateFormatUtils;

/**
 * 时间工具类
 * 
 * @author admin
 */
public class DateUtils extends org.apache.commons.lang3.time.DateUtils
{
    public static String YYYY = "yyyy";

    public static String YYYY_MM = "yyyy-MM";

    public static String YYYY_MM_DD = "yyyy-MM-dd";

    public static String YYYYMMDDHHMMSS = "yyyyMMddHHmmss";

    public static String YYYY_MM_DD_HH_MM_SS = "yyyy-MM-dd HH:mm:ss";

    public static final DateTimeFormatter FORMATTER_MILLIS = DateTimeFormatter.ofPattern("yyyyMMddhhmmssSSS");

    public static String M_d = "M月d日";

    private static final DateTimeFormatter DF = DateTimeFormatter.ofPattern("yyyy-MM-dd HH:mm:ss");


    private static String[] parsePatterns = {
            "yyyy-MM-dd", "yyyy-MM-dd HH:mm:ss", "yyyy-MM-dd HH:mm", "yyyy-MM", 
            "yyyy/MM/dd", "yyyy/MM/dd HH:mm:ss", "yyyy/MM/dd HH:mm", "yyyy/MM",
            "yyyy.MM.dd", "yyyy.MM.dd HH:mm:ss", "yyyy.MM.dd HH:mm", "yyyy.MM"};

    /**
     * 获取当前Date型日期
     * 
     * @return Date() 当前日期
     */
    public static Date getNowDate()
    {
        return new Date();
    }

    /**
     * 获取当前日期, 默认格式为yyyy-MM-dd
     * 
     * @return String
     */
    public static String getDate()
    {
        return dateTimeNow(YYYY_MM_DD);
    }

    public static final String getTime()
    {
        return dateTimeNow(YYYY_MM_DD_HH_MM_SS);
    }

    public static final String dateTimeNow()
    {
        return dateTimeNow(YYYYMMDDHHMMSS);
    }

    public static final String dateTimeNow(final String format)
    {
        return parseDateToStr(format, new Date());
    }

    public static final String dateTime(final Date date)
    {
        return parseDateToStr(YYYY_MM_DD, date);
    }

    public static final String parseDateToStr(final String format, final Date date)
    {
        return new SimpleDateFormat(format).format(date);
    }

    public static final Date dateTime(final String format, final String ts)
    {
        try
        {
            return new SimpleDateFormat(format).parse(ts);
        }
        catch (ParseException e)
        {
            throw new RuntimeException(e);
        }
    }

    /**
     * 日期路径 即年/月/日 如2018/08/08
     */
    public static final String datePath()
    {
        Date now = new Date();
        return DateFormatUtils.format(now, "yyyy/MM/dd");
    }

    /**
     * 日期路径 即年/月/日 如20180808
     */
    public static final String dateTime()
    {
        Date now = new Date();
        return DateFormatUtils.format(now, "yyyyMMdd");
    }

    /**
     * 日期型字符串转化为日期 格式
     */
    public static Date parseDate(Object str)
    {
        if (str == null)
        {
            return null;
        }
        try
        {
            return parseDate(str.toString(), parsePatterns);
        }
        catch (ParseException e)
        {
            return null;
        }
    }
    
    /**
     * 获取服务器启动时间
     */
    public static Date getServerStartDate()
    {
        long time = ManagementFactory.getRuntimeMXBean().getStartTime();
        return new Date(time);
    }

    /**
     * 计算两个时间差
     */
    public static String getDatePoor(Date endDate, Date nowDate)
    {
        long nd = (long)1000 * 24 * 60 * 60;
        long nh = (long)1000 * 60 * 60;
        long nm = (long)1000 * 60;
        // long ns = 1000;
        // 获得两个时间的毫秒时间差异
        long diff = endDate.getTime() - nowDate.getTime();
        // 计算差多少天
        long day = diff / nd;
        // 计算差多少小时
        long hour = diff % nd / nh;
        // 计算差多少分钟
        long min = diff % nd % nh / nm;
        // 计算差多少秒//输出结果
        // long sec = diff % nd % nh % nm / ns;
        return day + "天" + hour + "小时" + min + "分钟";
    }

    /**
     * 获取最近五年年份
     * @param examYear
     * @return
     * @throws Exception
     */
    public static List<String> getLatestFiveYears(String examYear) throws Exception {
        List<String> yearList = new ArrayList<>();
        // 没有传年份则获取最近新的年份
        if (StringUtils.isEmpty(examYear)){
            LocalDate localDate = LocalDate.now();
            examYear = String.valueOf(localDate.getYear());
        }
        yearList.add(examYear);
        SimpleDateFormat formats = new SimpleDateFormat("yyyy");
        Date date = formats.parse(examYear);
        for(int i=1;i<=4;i++){
            Calendar c = Calendar.getInstance();
            c.setTime(date);
            c.add(Calendar.YEAR,-i);
            Date tmp =  c.getTime();
            yearList.add(formats.format(tmp));
        }

        return yearList;
    }

    /**
     * 获取上一年的年份
     * @param curYear
     * @return
     */
    public static String getLastYear(String curYear){
        String lastYear = null;
        try {
            SimpleDateFormat formats = new SimpleDateFormat("yyyy");
            Date date = formats.parse(curYear);
            Calendar c = Calendar.getInstance();
            c.setTime(date);
            c.add(Calendar.YEAR,-1);
            Date tmp =  c.getTime();
            lastYear = formats.format(tmp);
        }catch (Exception e){
            e.printStackTrace();
        }
        return lastYear;
    }

    /**
     * 格式化日期
     * @param date
     * @param pattern
     * @return
     */
    public static String formatDate(Date date,String pattern){
        SimpleDateFormat simpleDateFormat = new SimpleDateFormat(pattern);
        return simpleDateFormat.format(date);
    }
    /**
     * 日期转string
     *
     * @param date date
     * @return String
     */
    public static String localDateMillisToString(LocalDateTime date) {
        return date != null ? date.format(FORMATTER_MILLIS) : "";
    }
    
    public static LocalDateTime asLocalDateTime(Date date) {
        return Instant.ofEpochMilli(date.getTime()).atZone(ZoneId.systemDefault()).toLocalDateTime();
    }


    public static LocalDateTime getFormatNow() {

        return LocalDateTime.parse(LocalDateTime.now().format(DF),DF);
    }



    /**
     * 获取分秒
     *
     * @param diff
     * @return
     */
    public static String getTimeStr(long diff) {
        long nm = 1000L * 60L;
        long ns = 1000L;
        // 计算差多少分钟
        long min = diff / nm;
        // 计算差多少秒//输出结果
        long sec = diff % nm / ns;
        return min + "分钟" + sec + "秒";
    }

    /**
     * 获取秒
     *
     * @param diff
     * @return
     */
    public  static BigDecimal getMinTimeStr(long diff) {
        long nm = 1000L * 60L;
        // 计算差多少秒//输出结果
        BigDecimal min = new BigDecimal(diff).divide(new BigDecimal(nm), 2, BigDecimal.ROUND_HALF_UP);
        return min;
    }

    /**
     * 获取分秒
     *
     * @param diff
     * @return
     */
    public static String getTimeStrNoSingn(long diff) {
        long nm = 1000L * 60L;
        long ns = 1000L;
        // 计算差多少分钟
        long min = diff / nm;
        // 计算差多少秒//输出结果
        long sec = diff % nm / ns;
        return min + "." + sec;
    }
}
